Men with higher levels of testosterone and a growth hormone in their blood are more likely to be diagnosed with prostate cancer, according to a new study.
A research of more than 200 000 men is one of the first to show strong evidence of two factors that could possibly be modified to reduce prostate cancer risk.
"Prostate cancer is the second most commonly diagnosed cancer in men worldwide after lung cancer and a leading cause of cancer deaths. But, there is no evidence-based advice that we can give to men to reduce their risk," said study lead author Ruth Travis, Associate Professor, University of Oxford, the UK.
"We were interested in studying the levels of two hormones circulating in the blood because previous research suggests they could be linked with prostate cancer and because these are factors that could potentially be altered in an attempt to reduce prostate cancer risk," Travis added.
The researchers studied 200 452 men who are part of the UK Biobank project. All were free of cancer when they joined the study and were not taking any hormone therapy.